Dictionary
Find
in
Dictionary
Thesaurus
Translations

Click to move up the list of words
A.U.
A.u.
A.U.C.
a.v.
A/VOD
A/W
A1
AA
aa
AAA
AAA server
AAA tenant
AAAL
AAAS
AAD
AAF
AAFC
Click to move down the list of words
Also available:

World English Dictionary
Dictionnaire Français

aa

aa [  ]


noun 
Definition:
 
volcanic rock: solidified lava with a rough jagged surface and sharp angular features

[Mid-19th century. < Hawaiian a-'a]
Advertisement

© 2009 Microsoft